meso-四(4-磺酸苯基)卟啉与铅显色反应及其应用  

STUDY ON THE COLOR REACTION OF LEAD WITH TPPS_4 AND ITS APPLICATION

作　　者：闫俊英[1] 霍广进[1] 刘彦钦[1] 韩士田[1] 吴银素[1] 谢虹[1] 

机构地区：[1]河北师范学院,石家庄050091

出　　处：《理化检验（化学分册）》1998年第11期492-493,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：河北省自然科学基金资助课题

摘　　要：研究了铅与meso-四(4-磺酸苯基)卟啉(TPPS_4)的显色反应条件,试验发现,在盐酸羟胺存在下和碱性(pH 12)介质中,铅与TPPS_4在室温即可络合完全,络合比为1:1,摩尔吸光系数ε=2.64X10^5,铅含量在0～2.0μg/10ml范围内呈线性,经APDC/MIBK 萃取分离,排除干扰后,用于自来水、桃叶中痕量铅的测定,结果满意.The color reaction of meso-tetrakis(4-sulfophenyl) porphyrin (TPPS4) and lead in the presence of hydroxylamine hydrochloride was studied. The experimental results indicated that at room temperature, in an alkaline solution of pH = 12, a stable 1 : 1 (M : L) complex is formed. The Soret band of the complex is at 465nm. The apparent molar absorptivity is 2. 64×10~5. Beer's law is obeyed in the range of 0~2. 0μg of lead per 10ml. This method has been used to determine microamounts of lead in pipewater and peach leafage with satisfac-tory results.

关 键 词：铅 卟啉 吸光光度法 TPPS4 显色反应 分析 

分 类 号：O614.433[理学—无机化学]